An axon (from Greek á¼Î¾ÏÎ½ axÅn, Ã¡xÅn), axis is a, long slender projection of a nerve, cell or, neuron that typically conducts electrical impulses away from the'neuron s cell. Body myelinated axons are known as nerve. fibersome types of neurons have no axon and transmit signals from their dendrites. No neuron ever has more than one axon; however in invertebrates such as insects or leeches the axon sometimes consists of several regions that function more or less independently of each other.
Mouth breathing refers to the state of inhaling and exhaling through the mouth. A healthy individual normally breathes through the nose while resting or doing light exercise, and breathes simultaneously through both the nose and mouth during vigorous aerobic exercise, in order to supply sufficient oxygen.
However, another common technique, pursed lip breathing, has more merit, Criner says. The technique can ease shortness of breath. To do pursed lip breathing: Relax your neck and shoulder muscles. Breathe in for two seconds through your nose, keeping your mouth closed. Breathe out for four seconds through pursed lips. If this is too long for you, simply breathe out twice as long as you breathe in.